Drying apparatus



DRYING APPARATUS.

E. B. AYRES AND H. BOGATY.

APPLICATION FILED 050.1, 191s.

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E. B. AYHES AND H. BOGATY.

DRYNG APPARATUS.

APPLICATION FILED DEC. I, 1919.

1,333,003. 4 Patented 0.11. 11, 1921.

4 SHEETS-SHEET 2.

E. B. AYRES AND H.l BOGATY.

DRYING APPARATUS.

APPLICATION FILED DEC. Il 1919.

Patented Oct. 1.1, 1921.

4 SHEETS-SHEET 3.

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QRYING APPARATUS.

APPLICATION FILED DEC. I, 1919.

Patented Oct. 11, 1921.

4 SHEETS-SHEET 4.

UNITED STATES PATENT oFFlcE.

ELWOOD IB. AYRES AND HERMANN BOGATY, OF PHILADELPHIA, PENNSYLVANIA,ASSIGNORS TO THE PHILADELPHIA TEXTILE MACHINERY COMPANY, OFPHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA DRYINGAPPARATUS.

Specification Voi Letters Patent.

Patented Oct. 11, 1921.

Application tiled December 1, 1912. Serial No. 341,664.

l To all whom t may concern.'

Be it known that we, ELWooIi B. AYREs and HERMANN BOGATY, a citizen ofthe United States and a citizen of Russia, respectively, (the saidBogaty having declared his intentions of becoming a citizen of theUnited States,) and residents of Philadelphia, Pennsylvania, haveinvented certain Improvements in Drying Apparatus, of which thefollowing is a specification. y

Our invention relates to certain improvements in driers of the type inwhich the material is carried through a drying chamber and the air iscirculated through the drying chamber and through a heating chamber bymeans of fans, or other devices, so that the material passing throughthe drying chamber will be properly dried.v

One object of our invention is to provide a conveyer of the above typethat will carry powdered, or other, material, and, in some cases,liquid, which is to be dried.

Another object of the invention is to provide a pan conveyer and todesign the pans so that their edges will overlap in order that acontinuous stream of material will flow into the pans without spilling.

A further object of the invention is to provide a conveyer so that thematerial is carried by both runs of an endless chain.

A still further object of the invention is to provide meansfor'discharging the ma-l terial from one run to the run next below andto reduce, separate, or crush certain materials as they pass from onerun to the other.

The invention also relates to certain details, which will be fullydescribed hereinafter, reference being-had to the accompanying drawingsin which:

Figure 1 is a longitudinal sectional View illustrating our improved`drying apparatus;

Fig. 2 is a transverse sectional view on the line 2 2, Fig. 1;

Fig. 3 is an enlarged view, showing the conveyers and the reducingrolls;

Figs. 4, 5 and 6 are views illustrating detais of one of the pans andthe hangers; an

Fig. 7 is a view illustrating amodification in which a single conveyeris used.

Referring to Figs. 1, 2 and 3 of thedrawings, 1 is the casing inclosinga drying 5 are located in the partitions between the heating chambersand the drying chambers so as to circulate the air transversely throughthe heating chambers.

While' we have shown a given type of drying apparatus, it will beunderstood that the invention may be used in different types ofapparatus having various methods of circulating air and heating the airin circulation.

6, 6a are two sets of endless chains. The chains 6 are adapted to passaround sprocket wheels 7 on a driven shaft 8 and around a sprocket Wheel9 at the opposite end of the drier. The chain 6a is adapted to passaround sprocketvwheels 7a on a driven shaft 8a at one end of the drierand at the opposite end around a sprocket wheel 9. The chains carrypans10, which are pivotally suspended from the chains, as clearly shown inFig. 3. Each pan 10 is attached lto a hanger 11 at each side pivoted at12 to the chains and the hanger at one side has an arm 13 extendingabove the run of the chain and has a projection 14 below the pan,-asshown in Figs. 4 and 5. The distance between the centers of the pivotsofthe pans is such that when the pans are on the horizontal run, the lipof one pan overlaps and preferably interlocks with the lip of anotherpan, so that the material, either powder or liquid, discharged into thepans from a continuous flowing chute, will not be spilled, as one afteranotherof the pans passes the chute.

It will be noticed that the pivots 12 for each pan are not attacheddirectly to the chains, but to an arm 16 securely bolted to o ne of thelinks 17 of the chain beyond the pivot point, Fig. 6, so that, inpassing around curves, as at the left of Fig. 3, the pan is raised inorder that its rear lip will disengage the forward lip of the succeedingpan, and, having completed this movement, its forward lip will rest uponthe lip of the preceding pan. When the pans pass around the sprocketwheel 7, in the direction of the arrow, the arms 16 will lower the pan10 so as to disengage its lip from the lip of the succeeding pan andwill carry it onto the upper run with its lip under the lip of thepreceding pan so that at all points, except where they pass around thesprocket wheels, one pan overlaps another.

In this drier, it is desirable that the material be discharged from eachrun of each conveyer and to provide reducing, or crushing, rolls betweenwhich the material passes. We provide a hopper 18 directly below theupper run of the conveyer 6. This hopper is located above a pair ofreducing rolls 19, and the material after passing between these rolls isAdischarged directly into the pans 10 on the lower run of the conveyer.In order ,to discharge the pans on the upper run, we provide cams 20,which are located in the path of the projections 14, so that when a panstrikes this cam it is tilted, as shown in Fig. 3, and its contentsdischarged into the hopper 18. When the pan passes the cams it graduallyassumes its horizontal position, being empty, and is not filled until itpasses under the reducing rolls 19.

When the material is discharged into-the pan from the hopper it has beenthoroughly mixed and reduced and will be carried by the pans onto thelower run of the conveyer 6 until it reaches a discharge point, where acam 21 is located in the path of the upper projecting arms 13 of the panand the contents of the pan will be discharged into another hopper 18bunder which arereducing rolls 19a. rlhe material passes between theserolls into the ans on the lower run 6a of the conveyer, an the aboveoperation is repeated.

The lowest rolls 19h, in the present instance, are the crushing rolls,but it will be understood that the type of roll may be modilied,depending upon the material being dried.

In Fig. 1, we have shown two endless belt conveyers, but it will beunderstood that a single conveyer may be used, as shown in Fig. 7, ormore than two belts may be used,

if desired, and the material may be discharged directly from the lowerrun of the lower conveyer into a hopper, or may pass through lnalcrushing rolls, as illustrated in Fig. 1, land into a hopper 22, whichmay discharge the material into any suitable conveyer, or receptacle. 4

In the` present lnstance, we have shown a feeding hopper 24 having aninclinedchute 25, which deposits material onto the upper run of theconveyer 6. ln this hopper is a feed wheel 26, which can be driven atany speed desired so s to increase or diminish the amount'of materialdischarged from the spout onto the conveyer.

It will be seen by the above construction that we are enabled to carrymaterial through a drying chamber by means of pans and to .discharge thematerial from the pans from an upper run to the lower run of the sameconveyer, o r from the lower run of one conveyer to the upper run ofanother conveyer so that both runs of the conveyer carry material. Thismaterial is subjected to the dryving action of currents of heated airpassing transversely through the drying chamber. The crushing rolls, orreducing rolls, may be located under one or more, or all of the hoppers,if found desirable-j. Where `material is being dried that does notrequire reducing, when the hopper may be so shaped as to direct thematerial from the pans of the upper run to the pans of the lower run theamount of material passing .to the drier.`

One or more discharge devices may be used where the materiall has atendency to cake or form lumps and reducing rolls may also be used tobreak up the cakes and lumps, if found desirable.

We claim: l

1. The combination in a drying apparatus, of a drying chamber; anendless chain conveyer therein; pans pivoted to the conveyer and hungbelow the chain, each pan having a lip at each end shaped so that thelip of one pan will interlock with the lip of an adjoining pan; means ateach end for discharging the pans; means for releasing the lip of onepan from that of an adjoining pan; and means for feeding'material to thepans.

2. The combination in a drier, of a drying chamber; conveyers extendingthroughout the length of the drying chamber; frames pivotally connectedto the conveyers; pans 'carried by the frames, each pan having a lip ateach end so that when the pans are traveling in a horizontal plane the'lip of one pan will overlap that of another pan; means for dischargingthe pans at each run of the conveyer; hoppers for receiving the materialand guiding the material from an upper run toa lower run; and means forfeeding material to the pans.-

3. The combination in a drying apparatus,

of a drying chamber; means for circulating tween the upper and lowerruns of a conveyer, the hoppers at the end being located between theconveyers, said hoppers being arranged to receive material from oneconveyer and tb direct it onto the pans of a run directly below it.

4. The combination in a drier, of a drying chamber; a conveyer having aseries of pivoted pans arranged to travel in a series of runs, onedirectly below another; reducers between the several runs, one reducerbeing at one end of the drier and the other at the opposite end thereof,thepanson one run of the conveyer traveling in one direction andthe'pans on the other run traveling in the opposite direction so thatmaterial carried by an upper run will be discharged through a reduceronto a lower run and will be carried by the said lower run to theopposite end of the machine where it will be discharged through anotherreducer onto a run directly below it, traveling in the oppositedirection.

ELwooD' B.A AYRES. HERMANN BoGATY.

